Tire cementing apparatus



Aug. 28, 1956 H. E. KIMES 2,760,550

TIRE CEMENTING APPARATUS med ocr. 21, 195s d 2 sheets-Sheet 1 36 EBI.

IN V EN TOR.

Aug. 2s, 1956 H. E. KIMES 2,760,550

TIRE CEMENTING APPARATUS Filed Uct. 2l, 1955 2 Sheets-Sheet 2 IN VEN TOR.

United States Patent@ TIRE CEMENTINGiAPPARATUS Harold ErKimes, Freeport, Ill.

Application October 21, 1953,".Se`rial -No53875424 V6 Claims. l (Cl.(154f9) This invention relates toapparatus'for applying .cement to pneumatic tirev casingsfduring'treading `or retreading of the casings.

Prior to treading or--retreading 1of` a tire "casing, the outer surface of the casing -is roughenedand thencoated -wit'h cement to secure a camelbaek'thereto. 'Tole'ffecta proper bond between the casing body and itstreadpor tion, it is necessary that -thecement-be evenly and uniformly applied to the casing body. `Inshops 4engaged in retreading tire casings, it is conventional practice to manually brush the cement vonto the casing. Itf-will-be appreciated that such a practice doesnot insurefa uniform coating of cement and a resultant uniform bond between the casing body and its tread portion. llt is-also apparent that the manual applicationof cementtoztire casingsby means of brushes is `afrelatively expensive 1`process, v1due `to the waste of cement andthetime consumedbythe workman. -It is, therefore, an object f'the xpresent invention to provide an apparatus adaptedfto quickly apply'a uniform coating of cement to tire casi-ugs withl minimum effort by the operator.

In the retreading of worn' tire'casings, it-is not uncommon to process casings having cuts; recesses,-etc.in'their outer-surfaces. While the walls dening'suchcuts, etc., should be coated with cement, it is`not desirable -to leave such cuts filled with cement asthecement:forms` gas bubbles between the casing Land Camelback -during -vul canization. It is, therefore, another-'object of the-invention to provide an apparatus'embodying-meansffor cement coating the walls defining such*cuts-recesses,-etc.and= for removing excess cement therefrom.

A further object of the invention-'resides Yinthe "provision of a tire cementing apparatus-which-is'relatively simple and inexpensive -in `construcfion'and vreliablein operation.

Another object of the invention resides in the provision 50 of an apparatusadapted for use inzlappxlyingtcement to tire casings of different sizes.

This invention embodies other nov'el features, details of consfructionand arrangementof parts which-are" hereinafter vset forth -in the specification and claims and-illustrated in the accompanying drawings, wherein:

Fig. 1 is a side elevational Aview illustrating a '-tire cementing apparatus embodying features of the invention.

Figs. 2 and 3 are end elevational views of same.

Referring now to the drawings for a better understanding of the invention, the tire cementing apparatus is shown as comprising a conventional chuck 4 secured on the end of a shaft 6 journaled for rotational movement in suitable bearings provided at the upper end of upright frame members 7 7 mounted on a base 8. The chuck 4 may be of any suitable design or construction embodying a plurality of radially adjustable jaws 9 adapted to engage or disengage the bead portion of a tire casing C responsive to rotational movement of the usual jaw actuating member (not shown).

A driven sprocket 11 is keyed to the shaft 6 for engage- 2,760,550 Patented Aug. 28, 1956 ice 5 L14ffor engagement by an' endless chain/18 which extends around a driving sprocketflfkeyed to a brush driving shaft 21 journaled'in suitable-bearing"brackets 20-20 provided on adjacent'eridframe `members 22.

A driven `sprocket -23-is -keyed tol the shaft 21 for en- 10 -gagement--byan endless chain'24 which extends around -a drivingl sprocket 26 keyedy to theshaft 25 of a conven- `1tional speed reducing- `unit 27 connected to anl electric motor 28 `mounted 'oni'the Vbase y8.

The longitudinalfframe-members 16-16 are secured 15 attheirv ends tol end frame rnembers'ZZ Idisposed adjacent -one end ofthe base'S-and to end frame Vmembers 29-29 f-.secure'd to and extending upwardly froml the other end :ofthe base. yToy reinforce the upright frame members 7-7, braces 31--31 are provided to connect the upper -ends of y-said'mernbers `to theend'frame members 22-22. A-bracket32 isfsecuredto and projects upwardly from the Ibraces131-'31to supporta tank 33 adapted to house -a supplyof 'fluid-cement for application to the outer periphery of the tire casing'C,-`-the tank being adjustably I`positioned Ialong the'bracket by means of locking screw 34. -A removable'c'over36 is provided on the upper open end offthetank,- and-a'discharge-conduit 37 extends down- -vwardly andfthencelaterallyfrom the lower end of the -tank. A Valve'38 is provided in the conduit 37 adjacent "thetankto controlfthef'flow of cement from the latter, and the conduitis'formedwitha plurality of spaced apertures `ori-ports 39 for the-passage of streams of cement onto the itire easing.v

'A-plurality-of*relativelymovable-rods 41 are pivotally 4`mounted ontheconduit 37 with their lower ends resting upon the -tire casing'to'spread the cement over that portion "of the casing to' becemented tothe Camelback,

A pair of vertically spaced brush elements 42 and 43 are journale'd'forrotational movement on upright support `members 44-44 mounted adjacent their lower ends on -thef-'frame members A16`-16A and brackets 2t)-20.y Each `-brushelement is shown -as comprising va frame having radially vdisposedarms 46m-support brush backs 4'7 hav- L'ing bristles I48 thereon,the brush backs being secured to their respective arms by means of` screws and being re- -smovable for`cleaning` or replacement-when worn out.

The support members 44-44 are, preferably journalerl on-i the shaft 21'with theirlower ends secured to their Hrelated 1frame -members 16-'16 `by bolts 49-49 which extend-through-slofs-51-4-51'in theframe vmembers to -permit pivotal adjustment of' the support members relative to the chuck 4 to accommodate casings of diierent diameters.

A' driven sprocket-"52 is secured to'fthe brush element 55 42='for\engag'ementby'ant-endless vchainh'S?, which extends around a driving sprocket 54 keyed to the shaft 21. Driving-and d'rivenpulleys;secured to'th'ebrush-elements 42 and 43, respectively, are interconnected by an endless belt 56 to drive the brush element 43 in a reverse direction to the direction of rotation of the brush element 42, as indicated by the arrows in Fig. l.

While the brush elements 42 and 43 are adapted to spread the cement in a uniform layer or coating over the periphery of the casing free of cuts, recesses, etc., it is apparent that additonal coating means is required to coat the walls of such recesses and to remove excess cement therefrom to prevent the formation of gas bubbles during vulcanizing of the Camelback onto the casing. Such additional coating means is shown as comprising a stippling device indi-cated generally at 57.

The stippling device is shown as comprising brush support arms 58-58 mounted for common pivotal movement on a shaft 59 journaled at its ends in the frame members 16-16. Shafts 61 and 62 extend between the arms 58-58 to pivotally support identical brush members 63 and 64, respectively, intermediate their ends. Each brush member is provided at opposite ends thereof with a tuft of bristles 66 for alternate engagement against the tire casing C.

The brush members 63 and 64 are provided with arms 67 and 68, respectively, formed with apertures 69 to slidably receive actuating rods 71 and 72, respectively. Adjacent ends of the rods are secured to a collar 73 journaled on an eccentric 74 keyed to a shaft 76 which is journaled at its ends on the arms 58-58. A pair of idler sprockets 77 and 78 are secured to a shaft 59 to be driven by an endless chain 79 extending around the sprocket 77 and a driving sprocket 81 keyed to the shaft 25. An endless chain 82 extends around the idler sprocket 78 for driving engagement with a driven sprocket 83 keyed to the shaft 76. Helical compression springs 8 4-84 and 86-86 are mounted on rods 71 and 72, respectively, to alternately engage opposite sides of related arms 67 and 68 during rotation of the eccentric 74. t

lTo accommodate tire casings of different sizes, the" stippling device 57 is pivotally adjustable about the shaft S9 by means of a bolt 87 which is pivotally connected to an arm S8 and extends through an aperture in a bracket 83 secured on a frame member 29.

in the operation of the apparatus thus described for= across the outer surface thereof by the pivotally supported depending rods 41, and is then brushed along the surface of the tire casing by means of the rotary brushes 42 and 43 to provide a uniform coating of cement on the outer surface of the casing. The stippling brushes 63 and 64 are actuated to engage the ends of the bristles 66 against the outer surface of the tire casing to coat the walls defining grooves or cuts in the tire casing and to remove excess cement from such grooves or cuts. As is well known in this art, a small pool of cement within a cut or groove in the tire casing Will result in the formation of gas bubbles during vulcanization of a Camelback onto the casing.

While this invention has been shown in but one form, it is obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit and scope of the claimed invention.

I claim as my invention:

l. In a cementing apparatus, means to rotate a tire casing about a horizontal axis, means to feed cement by gravity onto the outer surface of the casing, rod means to spread the cement over said outer surface, rotary brush means to distribute the cement evenly over said outer surface, and stippling brush means operative to remove excess cement from recesses in said outer surface.

2. In a cementing apparatus, means to rotate a tire casing about a horizontal axis, means to feed cement by gravity onto the outer surface of the casing, rod means to spread the cement over said outer surface, rotary brush means to distribute the cement evenly over said outer surface, stipplingbrush means operative to remove excess cement from recesses in said outer surface, said stppling brush means including a brush member having a tuft of bristles thereon and projecting therefrom, and means to move said brush member to alternately engage and disengage the endsv 'of the tuft of bristles with the outer surface of said casing.

3. In a cementing apparatus, means to rotate a tire casing about a horizontal axis, means to feed cement by gravity onto the outer surface of the casing, rod means to spread the cement over said outer surface, rotary brush means to distribute the cement evenly over said outer surface, stippling brush means operative to remove excess cement from recesses in said outer surface, said stippling brush means including a `brush member having a tuft of bristles thereon and projecting therefrom, means to move said brush member to alternately engage and disengage the ends of the tuft of bristles with the outer surface of said casing, said stippling brush member being supported for pivotal movement on a support arm, and means to adjust the position of said support arm relative to said ax1s. l

4. In a tire cementing apparatus, a chuck rotatably ymounted on aframe to engage and support a tire casing,

means `to rotate said chuck, means to direct streams of cement onto the downwardly moving side of the tire casing, means to spread the cement in an even coating over the outer surface of the casing, and stippling brush means operative to-remove excess cement from recesses in said surfacef 5,. In a tire cementing apparatus, a chuck rotatably mounted on a frame to engage and support a tire casing, means to rotate said chuck, means to direct streams of cement onto the downwardly moving side of the tire casing, means to spread the cement in an even coating over the outer surface of the casing, and stippling brush means operative to remove excess cement from recesses in said surface, the last mentioned means including tufts of bristles movable into and out of engagement with` said surface. y 6. An apparatus according to claim 5 in which the tufts of bristles are mounted on opposite ends of a brush back journaled intermediate its ends for pivotal movement, and means to oscillate said brush back about its journal.

References Cited in the tile of this patent y UNITED STATES PATENTS 

1. IN A CEMENTING APPARATUS, MEANS TO ROTATE A TIRE CASING ABOUT A HORIZONTAL AXIS, MEANS TO FEED CEMENT BY GRAVITY ONTO THE OUTER SURFACE OF THE CASING, ROD MEANS TO SPREAD THE CEMENT OVER SAID OUTER SURFACE, ROTARY BRUSH MEANS TO DISTRIBUTE THE CEMENT EVENLY OVER SAID OUTER SURFACE, AND STIPPLING BRUSH MEANS OPERATIVE TO REMOVE EXCESS CEMENT FROM RECESSES IN SAID OUTER SURFACE. 